Caius

At a Glance

Meaning

Traditionally glossed 'to rejoice,' though the Roman name's real root is unknown

Origin

Latin (variant of Gaius)

Gender

Boy

Pronunciation

KY-usListen

Caius (pronounced KY-us) is a Latin variant of Gaius, and it's often described as meaning 'rejoice' — but that's actually a popular myth, not a settled fact: 'rejoice' comes from an old folk etymology, and the true root of Gaius/Caius is unknown. If you like names with clean, modern lines and real Latin roots, Caius fits that description.

Meaning & Origin of Caius

Meaning: Traditionally glossed 'to rejoice,' though the Roman name's real root is unknown.

Origin: Latin (variant of Gaius).

A common claim: Rejoice Actually: 'Rejoice' is an ancient folk etymology (Latin gaudere) that stuck; the real origin of Gaius/Caius is actually unknown.

Source: Wiktionary.

How to Pronounce Caius

Popularity of Caius

In 2024, 205 baby boys were named Caius, ranking it #1061 nationally — and per SSA records going back to 1994, that's also the highest rank the name has ever reached.

Names Like Caius

These names share Caius’s style, era or origin.

• Amias
• Caian
• Creed
• Fidel
• Gus
• Kruz

FAQ

What does the name Caius mean?

Traditionally glossed ‘to rejoice,’ though the Roman name’s real root is unknown. (Source: Wiktionary)

How do you pronounce Caius?

Caius is pronounced KY-us (IPA: /ˈkaɪəs/).

Is Caius a popular name right now?

Caius is at its highest recorded popularity right now, ranked #1061 in 2024. (U.S. Social Security Administration data, 1994–2024.)

Make Caius Name Art

Free printable nursery art for Caius, pre-loaded below — pick a layout, palette, and font, then download a print-ready PNG.